Mark Lyons scored 20 points as No. 8 Arizona beat Washington State79-65 on Saturday, the Wildcats' fifth consecutive win over the Cougars.
Solomon Hill added 18 points for Arizona (19-2, 7-2 Pac-12), which swept the Washington schools on the road.
Brock Motum and DaVonte Lacy each scored 15 points to lead Washington State (11-11, 2-7), which has lost four of its past five games. D.J. Shelton added 13 points and 10 rebounds.
Hill scored all his points in the first half, when Arizona built a commanding lead it never lost.